Coffee-percolator with flexible coupling.



.l. B. BLEICHRODE.

COFFEE PE RCOLATOR WITH FLEXIBLE COUPLING. APPLICATION FILED JUNE Ia.I918.

1,288,376. Patented Dec.17,1918.

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IN VENTOR Wjm ATTORNEYS UNITED. STATES PATENT OFFICE.

JACOB B. BLEICHBODE, OF BROOKLYN, NEW YORK, ASSIGNOB '1OCBYSTALPERCOLATOB COMPANY, nm, 015 'NEW YORK, N. Y. A CORPORATION 01'NEWLYOBK.

GOFFEE-IPEBCOLATOR WITH FLEXIBLE COUPLING.

To all whom it may concern:

Be it known that I, Jacoe B. Bummnonn, a citizen of the United States,residin at Brooklyn, in the county of Kings an State of New York, haveinvented certain new and useful Improvements in Coffee- Percolators withFlexible Couplings, of which the following is a specification.

My invention relates to an improvement in the gasket or flexiblecoupling used in cofiee percolators which consists of a lower glass bulband an up er glass bulb having a funnel-shaped mout h projectin into thelower glass bulb, and having a fi ter therein, u on which the coffeerests, during the percp ation.

Percolators of this kind are old and wellknown and the connectionbetween them has customarily been made heretofore by a washer or gasket,whereby a tight fit between the parts was attempted to e secured.

As these bulbs are hand-blown, it is impossible to secure identicaldimensions in all the bulbs made, and as a result, experience has shownthat the users of these percolators in attempting to fit thefunnel-shaped mouth into the ower bulb, crack or break the neck of thelower bulb which requires the replacin thereof.

evices of this kind, which are made of L relatively'fra 'le glass areusually handled by persons w o are inexperienced in mampulating sucharticles and it is therefore highly desirable to have an efiicient andtight coupling between the bulbs that shall a vidual bulbs, so as toinsure a reliable and tight fit between the bulbs, without the dam gerof cracking or breaking in the hands of an inexperienced person.

The object of my invention is to provide a flexible gasket or couplingbetween the 'bulbs of these glass cofl'ee percolators that shall bereliable, give a tight fit, be automatically tightens during theoperation of the device, allow-for the variations in the sizes of thevarious bulbs and have other advanta which shall be pointed out in thedescription and drawings.

A preferred embodiment of my invention ow for variations in the sizes of'indi-' erably about 30 de ees.

Specification of Letters Patent. Patented Dec. 1'1,- 1918.

Application mes Iune 1a, 1918. serial no. 240,071.

, The ercolator vconsists essentially of a glass bu b 5, having asubstantially spherical main portion, provided with a neck into which afunnel-shaped mouth 4 of an uppir glass bulb 1 projects. The connectiontween the funnel-shaped mouth 4 and the neck of the bulb 5 is made bymeans of a gasket 6 preferably of fairly soft, flexible rubber. In theupper bulb 1 a filter cloth 2 is mounted on a rigid base which is caused0 lit tightly against the inner wall of the The exact meansf'or causinthe filter cloth 2 to fit tightly in the bul 1 are not shown as theseare well-known, and in themselves form no part of my invention. Theflexible gasket 6 has a substantially round head 8 which has asubstantially spherical contour up to the highest point thereof, andthen turns inwardly at a sharp angle of about 45 degrees until itcontacts with the intermediate portion 3 of the bulb 1 which is betweenthe main portion of the bulb and the funnel-shaped mouth 4. Thisintermediate Eortion 3 is tapered so that it 0011'. tacts wit the head 8at a small part thereof. The curvature of the intermediate ortion 3 issuch that the inwardly incllned portion 7 of the head 8 is at a sharpangle to the tangent at the point of contact, pref- This head 8 isstifi'errthan the wa s 9 of the coupling 6,

which form the body portion thereof. be-

cause of its greater thickness and it is made so stiff relatively, thatwhib it can be stretched to a certain extent in forcing'it upon the bulb1, it only contacts with the intermediate portion 3 substantially aroundA the oint of the inclined portion 7, so that whi e the contact is ti htanldelprevents leakage, it only exists or a atively small area.

At the botom portion thereof the coupling 6 has the walls 9 thereofprovided with an inner thickened ridge .10 which is likewise made sorigid that it forms a very tight fit with the funnel 4.

This construction causes the walls 9 of the coupling 6 to be spaced fromthe adjacent portion' of the bulb 1, so that an 1n-. termediate inclosedcell containing air is formed between the bulb 1 and thecouplin 6.

ence, when the coupling 6 is mounted upon the bulb 1, itcannot be forcedup beyond a certain distance on the intermediate portion 3 because ofthe thickness and stillnem of the head 8.

When the funnel portion 4 is pushed into the neck of the bulb 5, thecoupling 6 yields readily because of its flexibility and because it isnot in contact with the bulb 1 save at the top and bottom thereof. 7

Because of this, it is possible to push the bulb 1, into the 'bulb 5sufiiciently far to give a tight fit, without the slightest danger ofbreaking orcrackingthe delicate glass parts.) Even after the tight fitis secured it 18 possible to move the bulb.1 with respect to the bulb 5,because as shown in Fi 2, which illustrates the structure when ttedtogether, the bulb 1 always has a certain free relative movement withrespect to the bulb 5, because it is spaced fromthe cou-' pling -6except at two small areas of contact. The air between the gasket andbulb 1 always tends to keep the gasket inflated. The walls of the gasketare 'sufliciently'stifi to maintain the shape shown at all times.-

Further advantages arise during the o eration of the'device. In operatinthis eviee it is customary tofill the bu b 5 with water, the level ofthe water not being allowed to rise too near the neck.

Then the bulb 1 with the cou ling 6 connected thereto is inserted untila tight fit is secured.

The filter clo'th 2 havin been put into position and sufiicient pow eredor ground coffee having been placed thereon, the water in the lower bulb5 is heated by means of an alcohol lamp or any other suitable means. The11pressure of the steam generated in the unfi ed space of the bulb 5causes the water therein to rise uglthrough the funnel 4 and up throughthe ter cloth 2 until the level 0 the water in the bulb 5 is below themouth of the funnel 4:.

The pressure of the water which has now risen to the upper bulb 1further forces it into the bulb 5 so as to cause a tight fit.

As soon as the level of the water in the bulb 5 is below the mouth ofthe funnel 4,

the source of heat is removed and the cooling of the bulb 5 with theconsequent condensation of the steam causes the water wardly,

naaasve which has now extracted the soluble sub- .stances from thecoffee topass downwardl through the filter cloth 2 into the bulb 5.

'The device may be provided with a cover made'of flexible materialcomprising a body portion, and projecting spaced from each other an proectm mwardly from said bod portion tower the central axis of the ga et.j

2. In combination, a lower bulb having a neck, an upper bulb havmganopening at arts vertically its bottom adapted to lit in said neck, and

a gasket made of flexible material comprising a body portion and reecting arts yertically spaced from eac other an projecting inwardly fromsaid body toward the central axis of the asket, said lpg'ojectmg partsbeing stifieft an said wa 3. In combination, a lower bulb ha a neck, anupper bulb having a downwar y projecting mouth at its bottom, and adated to project into said neck, and a gasket upon said upperbulb at itsunction with the said neck, said gasket havin a body por-.

and ada 'ttion spaced from said upser b d t nec sai gas e ed to fittightly into sai also having vertically space parts projecting inwardlytower the vertical axis thereof, and tightly contacting with said upperbulb.

4. In combination, a lower bulb having a neck, an upper bulb having amain portion, a tapered intermediate portion and a downprojectingconically shaped mouth at its wer end adapted topro ect nto said neck,and a gasket fitted upon said upper bulb atits junction with said lowerbulb, said gasket having a bed portion comprlsmg relatively inclined ws, and inwardly rojecting walls, w ich contact wi b said intermediateortion and said mout respectivel said boilly portion being spaced fromsai uppe i 5. In combination, a lower bulb ha a neck, an up erbulbhaving a main portion, an interme iate portion and 'a downwardlyprojectin conically shaped mouth at its a ower en adapted to pro ectinto said neck, and a gasket fitted u on said u erbulb at its junctionwith ai lower b said gasket havin a body portion comprising relaingparts thicker arts above and below said inclined (projecting md aboveand below them, which tightly :ontact with said intermediate portion andsaid mouth respectivel said body portion beingI spaced from sai upperbulb.

6. n combination, a lower bulb, an upper bulb having a mouth at itsbottom adapted to fit into said lower bulb, and a asket connecting saidbulbs, said gasket aving .an

said upper bulb, an from said upfijer said lower bu a body portionspaced 10 bulb and contacting with In testimony whereof I hereunto aflixmy signature.

JACOB B. BLEICHRODE.

